JPS59152133A - Device for opening cover for packing box - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention can be used, for example, in a pre-processing process of an automatic filling line that automatically fills empty bottles with contents such as alcoholic beverages. This invention relates to a lid opening device for opening the lid of a packaging box being transported.

Conventionally, a packaging box opening device has been used to close a packaging box by folding a pair of lids connected to the corresponding edges of the box inward, abutting the leading edges of the lids, and pasting sealing tape. are conveyed on the conveyor with the abutted parts of the lid plates facing the conveyance direction, and pressing members provided on both sides of the conveyor press the tops of both sides of the box to shape the pair of lids into a chevron shape. The sealing tape is deformed to form a gap between the leading edge and the front edge of the box body, and the guide plate is inserted into this gap and the sealing tape is cut along the leading edge using a cutting blade set up on the top surface of the guide plate. However, especially with paper boxes such as cardboard boxes, the height to the edge of the box body varies, and when the height is higher than the specified height, the tip of the guide plate If the height is lower than the specified height, the box may hit the front of the box, and conversely, if it is lower than the specified height, it may hit the lid and damage the box. Also, if the lid contains moisture, it may deform into a mountain shape. The lifting height of the tip edge was low, and cutting errors often occurred.

The present invention was completed in view of the above points, and the height of the box body is measured each time before the lid is opened, and the height of the guide plate is adjusted based on the measurement result. It is an object of the present invention to provide a packaging box lid opening device that can prevent the above-mentioned damage to the box and cutting errors by accurately inserting the plate into the gap.

Hereinafter, one embodiment of the present invention will be described in detail based on the accompanying drawings.

In FIGS. 1 and 2, belt conveyor 1, first (D o
-y ml > Hair 2 and 12 roller conveyor 3
are arranged sequentially.

In addition, in the following explanation, the second roller conveyor 3
The front in the conveying direction of the second roller conveyor 3, that is, the right side in FIG. 1 will be referred to as the front, and the rear in the conveying direction of the second roller conveyor 3, that is, the left side in FIG. 1 will be referred to as the rear.

The sprockets 6 attached to both sides of the drive shaft 4 and driven shaft 5 provided at both front and rear ends of the second roller conveyor 3 have upper horizontal running parts located on the left and right sides of the upper surface of the second roller conveyor 3. A pair of endless chains 7 are connected, and both ends of a feed rod 8 extending across the upper surface of the second roller conveyor 3 are fixed to the endless chains 7 on both sides.

A pair of gate-shaped frames 10 are erected at both front and rear ends of the 20th roller conveyor 3 so as to straddle the 20th roller conveyor 3, and a vertical guide tube 11 is provided at the center of the upper side of each gate-shaped frame 10. A rack 12 is slidably inserted into each guide tube 11, and a worm is fixed at both front and rear ends of the front and rear gear boxes 13 fixed adjacent to each guide tube 11. A rotary rod 14 is supported to rotate freely across the worm, and a pinion 16 fixed coaxially with a worm wheel meshing with the worm faces inward from an opening on the rear surface of the guide tube 11 and is attached to the rack. 12 , and an operating handle 15 is attached to the rear end of this rotating rod 14 that projects from the gear box 13 .

The lower ends of both racks 12 penetrate through the upper side of the gate-shaped frame 10 and are exposed to the lower surface thereof, and an elongated horizontal elevating body 18 along the transport direction is fixed to the lower ends of both racks 12. This elevating body 18 connects the front and rear ends of two left and right support rods 19 arranged parallel to each other at intervals with a connecting rod 20.
The front part of the elevating body 18 has a structure connected by
Two shafts 21.2 perpendicularly passing through the left and right support rods 19
2 are rotatably supported at intervals, and the above-mentioned shafts 21 and 22 are supported on the upper surface of a short support 23 arranged parallel to the lower surface of the elevating body 18. Two shafts 24.25 are similarly rotatably supported at an interval equal to , and at a position generally forward of both shafts 21.22, and the lifting body 18 and the support body 23
The upper and lower ends of a pair of left and right links 26 are fixed to the protruding ends of the front shafts 21 and 240, respectively, and the rear shaft 2
The upper and lower ends of a pair of left and right links 27 are fixed to the side protruding ends of 2 and 25, respectively, and the elevating body 1
The tip of the piston rod 29 of the hydraulic cylinder 28 installed between the left and right support rods 19 of the third As shown in detail in the figure, the elevating body 18, the support body 23, and both links 26 and 27 constitute a parallel link mechanism B with the elevating body 18 as a fixed link, and are connected as the piston rod 29 expands and contracts. The shaft 22 is rotated via the N material 80, and the link 27 fixed to the shaft 22 swings, the parallelogram narrows or expands in the vertical direction, and the support body 23 moves up and down. It looks like this.

A vertical leg 33 and an inclined leg 34 are fixed to approximately the center of both front and rear ends of the lower surface of the support body 23, and at the lower ends of both legs 33 and 34 there is a guide elongated in the transport direction with a triangular rear end. The plate 35 is fixed horizontally, and a cutting blade 36 is attached to the side surface of the inclined leg 34. In particular, this cutting blade 36 is located at the center of the second roller conveyor 30 in the width direction. . Further, the tips of a pair of left and right presser bars 37 are fixed on the upper surface of the guide plate 35 in front of the above-mentioned inclined legs 34. After that, the lower surface of the guide plate 35 is lowered to a height that matches the upper surface of the guide plate 35, and from there it extends horizontally in parallel toward the front in the conveyance direction.

On the rear surface of the connecting rod 20 on the rear side of the elevating body 18 described above, there is a support 40 that protrudes above the first roller conveyor 2.
A downward air cylinder 41 is fixed to the upper surface of the support body 40 at a portion corresponding to the two sides of the first roller conveyor 2, and the tip of the piston rod 42 is attached to the support body 40. It penetrates and protrudes from its underside,
Further, a guide cylinder 43 is fixed to both sides of the air cylinder 410, and an elevating rod 44 that penetrates the support body 40 is inserted freely to slide, and the tip of the piston rod 42 and both elevating rods 4
A pressing member 45, which is elongated and horizontal in the conveying direction, is fixed to the lower end of 4. Further, at the upper end of the support plate 48 fixed adjacent to the guide cylinder 43 on the front side, first, second, and third
Three glue switches 49a, 49b and 49G are installed in order from the bottom to the top at intervals,
At the upper end of the front lifting rod 44, there are first holes that can engage with the upper surfaces of the contacts of the first, second and eighth limit switches 49a, 4.9b and 49C, respectively.
, second and third three engaging pieces 47a, 47b and 47
c is attached, and the first, second and third engaging pieces 4
In the order of 7a, 47b, and 47Q, the upper engaging pieces are connected to the corresponding first, second, and third limit switches 49a, 47Q, respectively.
49b and 49c are attached so that the distance between them and the contacts is wide.

Then, the first to third engagement pieces 47a to 47c and the first
First to third limit switches 4 by engagement with contacts of the third IJ limit switches 49a to 49C
The pressing member 45 is activated by the ON-OFF state of 9a to 49C.
1 When only the first limit switch 49a is turned on, the height of the first limit switch 49a and the second limit switch 49 is in the upper position.
Three positions are detected: the intermediate position when 1) is turned on, and the lower position when all of the first to third limit switches 49a to 49C are turned on, and this detection signal acts on the hydraulic cylinder 28 described above. It is sent to a pulse motor that drives a hydraulic pump that controls the amount of oil supplied, and supplies or returns a fixed amount of hydraulic oil to the hydraulic cylinder 28 in accordance with the detection signal, thereby adjusting the amount of extension of the piston rod 29. , the guide plate 35 is similarly brought to the upper, middle, and lower three positions via the parallel link mechanism B, and at this time, the guide plate 85 at each of the two, middle, and lower positions is The height of the lower surface is set to be slightly higher than the height of the lower surface at each of the corresponding upper, middle, and lower positions of the pressing member 45.

Further, above the second roller conveyor 3, a pair of left and right elongated guide members 51 along the conveyance direction are provided so that the interval and height can be freely adjusted. Four portions 52 are provided on the inner surface of the guide plate 35 at positions slightly rearward of the triangular rear end portion of the guide plate 35.
is formed in the bracket 53 installed in the recess 52, and a suppression roller 54 is attached to the guide portion 51 on the outer peripheral surface of the bracket 53.
It is supported in a state where it protrudes slightly inward from the inner surface of the.

The present embodiment has the above configuration, and its operation will be explained next.

The packaging box a to be opened contains an empty bottle C in a rectangular box body, a pair of inner lids C connected to the corresponding lip d are bent inward, and the above-mentioned A pair of outer lids g adjacent to the mouth rim d and connected to the corresponding mouth rim f are bent inward, the leading edges are butted against each other, and a sealing tape h is pasted to the abutted portion to close the lid. Before transporting the air cylinder 41, which is attached to the support body 40,
is activated to lower the pressing member 45 to an intermediate position where the first limit switch 49a and the second limit switch 49b are turned on and fixed at that position, and then by rotating the operating handle 15. When the height from the top surface of the tenth roller conveyor 2 to the bottom surface of the suppressing member 45 matches the specified height of the packaging box a by raising or lowering the entire lifting body 18 and the support body 40, the lifting body 18 and the support body 40 are fixed, and the elevating body 18 and the support body 4
0 is fixed, the piston rod 42 of the air cylinder 41 is contracted to once raise and return the suppressing member 45. Furthermore, the interval between the guide members 51 is adjusted to the width of the packaging box a, and the height is adjusted to the pressure roller 54. Adjust the height so that it is slightly lower than the height of packaging box a.

Then, the packaging boxes a are sequentially conveyed by the belt conveyor 1 with the abutting portions of the outer lids g facing the conveyance direction, and the packaging boxes a are transferred from the belt conveyor 1 to the first roller conveyor 2.
When it is detected by a phototube or the like (not shown) that the packaging box a has been transferred, the packaging box a is stopped, and at the same time, the air cylinder 41 is activated and the piston rod 42 is extended, so that the pressing member 45 is lowered and the packaging box a is moved. pressed against the top surface.

Here, if the packaging box a is at the specified height, the suppressing member 45
is located at an intermediate position, and the first limit switch 49a and the second limit switch 49b are turned on.
+, a certain amount of hydraulic oil corresponding to this detection signal is supplied to the hydraulic cylinder 28, the piston rod 29 is extended by a predetermined length, and the guide plate 3 is moved through the parallel link mechanism B.
5 to the middle position. The pressing member 45 rises and returns immediately after the detection signal is sent, but this detection signal continues to be held until the height of the next packaging box a is detected and a new detection signal is sent. The guide plate 35 is also continuously fixed at the intermediate position.

Next, when the packaging box a is transferred from the tenth roller conveyor 2 to the second roller conveyor 3 by a transfer device (not shown), the endless chain 7 is driven, and the packaging box a is moved along the lower part of the rear surface by the feeding rod 8. second roller conveyor 3
The packaging box a is conveyed forward while its movement in the width direction is restricted by the guide member 51, and when the packaging box a reaches the pressing rollers 54 provided on the guiding member 51, the upper parts of both sides of the packaging box a are pressed by the pressing rollers 54. is pushed, the outer cover g deforms into a chevron shape, and a gap is formed between the outer cover g and the front edge d. Here, since the guide plate 35 is located one level above the lip d of the packaging box a, the packaging box a has the guide plate 35 in the gap.
As shown in Fig. 3, the cutting blades 36 attached to the two sides of the guide plates 3 and 5 cut the sealing tape h along the tip edge of the outer cover g, and then The separated outer lid g hits the presser bar 37, and as the packaging box a moves forward, the outer lid g is pressed by the presser rod 37 and gradually opens, and the packaging box a is moved to the second roller conveyor 3. When the outer cover g reaches the frontmost end, the outer cover g is rotated 180 degrees, and the opening operation of the outer cover g is completed.

Then, the packaging box a is transferred onto a third roller conveyor 60 disposed perpendicularly in front of the second roller conveyor 3, and is disposed above the center of the 30th roller conveyor 60 along the conveying direction. With its two sides pressed down by the presser rod 61, it is transported toward the next lid opening device for the inner lid C.

When the packaging box a whose outer lid g has been opened is transferred onto the third roller conveyor 60, the next packaging box a is transferred from the belt conveyor 1 onto the first roller conveyor 2 and stopped. , the pressing member 45 descends again and is pressed against the top surface of the packaging box a.

Here, when this packaging box a rises above the specified height, the pressing member 45 is located at the upper position and the first IJ
Only the Mitsutwitch 49a is in the ON state, and a certain amount of hydraulic oil is further supplied to the hydraulic cylinder 28 in response to this detection signal, and as shown by the chain line in FIG. The guide plate 3 is further extended by a predetermined length and is connected to the guide plate 3 via the parallel link mechanism B.
5 to the upper position. At this time, since the guide plate 35 is located slightly above the edge d of the tall packaging box a, when the packaging box a is conveyed on the second roller conveyor 3 in the same way as described above, , the sealing tape h is reliably entered into the gap formed between the outer lid g and the front edge d, and the sealing tape h is appropriately cut.

Conversely, when the packaging box a is lower than the specified height, the pressing member 45 is located at the lower position when the upper surface is pressed down, and the first to third limit switches 49a
49c to 49c are turned on, and this detection signal causes a certain amount of hydraulic oil to be returned, and the piston rod 29 reaches its shortest predetermined length, and the piston rod 29 is moved to the guide plate 35 via the parallel link mechanism B. At this time, since the guide plate 35 is located on the two sides of the mouth edge d of the short packaging box a, the outer lid g
and the front edge d,
This allows the sealing tape h to be cut accurately.

In addition, when the type of packaging box is changed, the air cylinder 41 is activated and the pressing member 45 is pressed.
is temporarily fixed at an intermediate position, and the operating handle 15 is rotated to raise or lower the entire lifting body 18 and support body 40 until the height of the lower surface of the suppressing member 45' is equal to the specified height of the new packaging box. When they match, the elevating body 18 and the support body 40
The same procedure as described above may be repeated by fixing the guide part vJ51 and adjusting the interval and height of the guide part vJ51.

Note that the intervals between the upper, intermediate, and lower positions to be detected by the pressing member 45 are determined by the distance between the first to third engagement pieces (15) and the first to third limit switches 49 & It can be set arbitrarily by changing the distance between the contacts 49C and 49C, and if the number of engagement pieces and limit switches is further increased, changes in the height of the pressing member 45, that is, the packaging box a, can be more easily controlled. Can be detected accurately.

Further, on both sides of the first conveyor 2, a large number of light emitting elements and light receiving elements are arranged in correspondence with each other in the vertical direction,
The height of the packaging box a may be measured by detecting the number of light receiving elements that have received light from the light emitting elements.

Furthermore, a configuration may be adopted in which the guide plate 35 is directly raised and lowered by a hydraulic cylinder.

As specifically explained in the above embodiment, the packaging box lid opening device of the present invention has a pair of lid plates connected to the corresponding edges of a rectangular box body through a fold line. Between the leading edge of the pair of lid plates and the mouth edge adjacent to the mouth edge of a packaging box that is closed by folding the lid inward at the fold line and abutting the leading edges and pasting sealing tape on the butted portion. In the packaging box opening device, the packaging box is opened by inserting a guide plate into a gap (16) configured to cut the sealing tape along the leading edge with a cutting blade installed on the upper surface of the guide plate. , comprising a device for measuring the height of the box before opening the lid, and a device for adjusting the height of the guide plate based on the measurement result, the device measuring the height of the box. By setting the guide plate so that it is always brought to a position slightly higher than that height, the height of the box body may vary, or the lid body may become chevron-shaped due to moisture. Even if the lifting height of the tip edge when deformed is low, the guide plate can be reliably entered into the gap formed between the tip edge and the mouth edge of the lid plate. without damaging the packaging box or making cutting mistakes due to the tip of the box hitting the front of the box or lid.
To achieve the effect that a sealing tape can be cut appropriately and a lid plate can be opened reliably.

[Brief explanation of drawings]

1 to 3 show one embodiment of the device of the present invention, and the first
The figure is a partially cutaway perspective view, FIG. 2 is a partially cutaway front view (17), and FIG. 3 is a partially cutaway enlarged front view showing details of the parallel link mechanism B. 28: Hydraulic cylinder 29: Piston rod 35:
Guide plate 36: Cutting blade 41: Air cylinder 42: Piston rod 44: Lifting rod 45: Pressing part'! A'47
a to 47c: first to third engagement pieces 4.9a to 4
9C: First to third limit switches B: Parallel link mechanism a: Packaging box b: Box body d: Edge f: Edge
g: Outer lid 11: Sealing tape Applicant CKD Co., Ltd. Applicant Zan) IJ-Co., Ltd. Agent Patent attorney Hiroshi Noguchi 181

Claims (1)

[Claims] A pair of lid plates that are connected to the corresponding edges of a rectangular box body through a crease line are bent inward at the crease line, the leading edges are butted together, and a sealing tape is pasted on the abutted portion to close the lid. While inserting the guide plate into the gap formed between the leading edge of the pair of lid plates and the lip adjacent to the opening edge of the packaging box, the sealing tape is cut using cutting blades erected on two sides of the guide plate. In the packaging box lid opening device, the packaging box lid is opened by cutting along the leading edge of the packaging box, which includes a device that measures the height of the box body before opening the lid, and a device that measures the height of the guide plate based on the measurement result. A packaging box lid opening device characterized by comprising: a device for adjusting the